Using Least 1s

Using Least 1s

Using Least 1s (Conway & Guy, 1962) Using multiplication and addition try to create the target number using the least number of ones.  For example… to get to the number 12, you could do (1+1+1+1)*(1+1+1) or (1+1+1+1+1)*(1+1)+1+1 but the first solution is...
Parable of the Polygons

Parable of the Polygons

Parable of the Polygons (Vi Hart & Nicky Case)   A simulation that shows how small changes in attitude can result in large societal shifts. Probability and statistics has rarely looked so beautiful and engaging. Beauty is the first test: there is no permanent...
Pirates & Cutthroats – algebra

Pirates & Cutthroats – algebra

Pirates & Cutthoats (MathPickle, 2013) Use algebra to help find solutions to putting pirates and cutthroats into jail. Sounds righteous, but its darn difficult when each cell has constraints for the fraction of pirates and cutthroats. Download puzzle-sheets here....
Squares Built of Right Triangles

Squares Built of Right Triangles

Squares Built of Right Triangles (MathPickle, 2012) Give your students practice working with the addition of square roots and Pythagoras. Download puzzle-sheets here. There is no science in this world like physics. Nothing comes close to the precision with which...
Algebra on Rectangles

Algebra on Rectangles

This is a single variable algebra puzzle in which students try to find squares of different sizes to tile a rectangle. I prefer the two variable algebra variant on the right. Get students to create their own history puzzles. Algebra on Rectangles (R. L. Brooks, C. A....